Water and sediment dynamics of penoxsulam and molinate in paddy fields: field and lysimeter studies

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dc.contributor.authorKogan, Marcelo
dc.contributor.authorAraya, Manuel
dc.contributor.authorAlister, Claudio
dc.date.accessioned2022-11-23T13:46:46Z
dc.date.available2022-11-23T13:46:46Z
dc.date.issued2011-07-15
dc.description.abstractBACKGROUND: In Chile, rice is cultivated under water-seeded and continuously flooded conditions. Because herbicide dynamics in paddy fields and non-flooded fields is different, 3 year experiments were performed to study the dissipation of molinate and penoxsulam in water and sediment. RESULTS: In field experiments, both herbicides dissipated by 45–55% from the initial applied amounts during the first 6 h after application in all crop seasons; in lysimeter experiments, dissipation amounts were approximately 10% for penoxsulam and 16% for molinate. Penoxsulam field water DT50 values varied from 1.28 to 1.96 days during the three study seasons, and DT90 values from 4.07 to 6.22 days. Molinate field water DT50 values varied from 0.89 to 1.73 days, and DT90 values from 2.82 to 5.48 days. Sediment residues were determined 2 days after herbicide application into the paddy water, and maximum concentrations were found 4–8 days after application. In sediment, DT50 values varied from 20.20 to 27.66 days for penoxsulam and from 15.02 to 29.83 days for molinate. CONCLUSIONS: Results showed that penoxsulam and molinate losses under paddy conditions are dissipated rapidly from the water and then dissipate slowly from the sediment. Penoxsulam and molinate field water dissipation was facilitated by paddy water motion created by the wind. Sedimentes_ES
dc.identifier.issn1526-4998
dc.identifier.other10.1002/ps.2276
dc.identifier.urihttps://hdl.handle.net/20.500.12536/1873
dc.language.isoenes_ES
dc.sourcePest Management Sciencees_ES
dc.subjectDissipationes_ES
dc.subjectAdsorptiones_ES
dc.subjectDesorptiones_ES
dc.subjectHerbicideses_ES
dc.titleWater and sediment dynamics of penoxsulam and molinate in paddy fields: field and lysimeter studieses_ES
dc.typeArtículo de revistaes_ES
uvm.carreraAgronomíaes_ES
uvm.escuelaEscuela de Ciencias Agrícolas y Veterinariases_ES
uvm.indexWoSes_ES
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